An answer in our "instant index" tonight to a question cat lovers ask. How do you cats see the world? Scientists put their science into artistic images. How humans see rush hour, the bottom is what a cat sees. Cats do not see color. The images are blurred unless something in that image moves and a cat can pounce. And it's on, battle of the bands. The nominees for the rock'n'roll hall of fame came out today. The first time the contenders really run the gamut. Starting with linda ron stat. &#9834; hall and oates. &#9834; and nirvana. &#9834; for the second year in a row, fans can weigh in and vote online. And do you remember the song from a little movie pitch perfect, which inspired a national cup drum craze? &#9834; well, tonight a dancer on broadway took it to the next level. An understudy for the book of mormon, he invited his dancer friends to come and tap out a song. The song we can't get out of our heads. &#9834; he said this is what they do while they're waiting around backstage. And next here, a new story

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